CN108580794A - A kind of high-strength high temperature-resistant resistance to deformation type precoated sand and its processing technology - Google Patents
A kind of high-strength high temperature-resistant resistance to deformation type precoated sand and its processing technology Download PDFInfo
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- CN108580794A CN108580794A CN201810292729.9A CN201810292729A CN108580794A CN 108580794 A CN108580794 A CN 108580794A CN 201810292729 A CN201810292729 A CN 201810292729A CN 108580794 A CN108580794 A CN 108580794A
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- precoated sand
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C1/00—Compositions of refractory mould or core materials; Grain structures thereof; Chemical or physical features in the formation or manufacture of moulds
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C1/00—Compositions of refractory mould or core materials; Grain structures thereof; Chemical or physical features in the formation or manufacture of moulds
- B22C1/02—Compositions of refractory mould or core materials; Grain structures thereof; Chemical or physical features in the formation or manufacture of moulds characterised by additives for special purposes, e.g. indicators, breakdown additives
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C1/00—Compositions of refractory mould or core materials; Grain structures thereof; Chemical or physical features in the formation or manufacture of moulds
- B22C1/16—Compositions of refractory mould or core materials; Grain structures thereof; Chemical or physical features in the formation or manufacture of moulds characterised by the use of binding agents; Mixtures of binding agents
- B22C1/20—Compositions of refractory mould or core materials; Grain structures thereof; Chemical or physical features in the formation or manufacture of moulds characterised by the use of binding agents; Mixtures of binding agents of organic agents
- B22C1/22—Compositions of refractory mould or core materials; Grain structures thereof; Chemical or physical features in the formation or manufacture of moulds characterised by the use of binding agents; Mixtures of binding agents of organic agents of resins or rosins
- B22C1/2233—Compositions of refractory mould or core materials; Grain structures thereof; Chemical or physical features in the formation or manufacture of moulds characterised by the use of binding agents; Mixtures of binding agents of organic agents of resins or rosins obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
- B22C1/2246—Condensation polymers of aldehydes and ketones
- B22C1/2253—Condensation polymers of aldehydes and ketones with phenols
Abstract
The invention discloses a kind of high-strength high temperature-resistant resistance to deformation type precoated sand and processing technologys, belong to new material technology field, wherein the high-strength high temperature-resistant resistance to deformation type precoated sand, is counted in parts by weight, which constitutes as follows：100 parts of roughing sand, 24 parts of ferroso-ferric oxide, 1.5 5.6 parts of anti-burnon, 1.8 3 parts of anti-vein additive, 1.5 5 parts of phenolic resin, 0.5 1.5 parts of 1# reinforcing agents, 0.3 1.0 parts of 2# plasticizer, 0.1 0.5 parts of methenamine solution, 1.2 2.5 parts of lubricant.The improvement and optimization of the proportioning and preparation process of precoated sand supplementary material of the present invention, so that precoated sand is provided simultaneously with the advantages of high temperature resistant, high non-deformability, good moldability, high intensity, good fluidity and low gas forming amount, complicated, high-performance enginer manufacturing requirements is fully met.Especially especially meet the manufacturing requirement of complex-shaped, tiny wall thickness sand core, not only ensures the easy collapsibility after elevated temperature strength and casting of the sand core in non-ferrous metal casting process, and the mechanical property of casting is also improved.
Description
Technical field
The invention belongs to new material technology field, more particularly to a kind of high-strength high temperature-resistant resistance to deformation type precoated sand.This hair
It is bright to further relate to a kind of processing technology of high-strength high temperature-resistant resistance to deformation type precoated sand.
Background technology
Precoated sand is the material for manufacturing sand mold (core) in casting industry, since precoated sand has intensity height, gas forming amount
Low, production casting dimension accuracy height, is convenient for the advantages that preservation at any surface finish, applies in recent years increasingly extensive.Precoated sand at present
Production technology has cold method with plastic film, cold dry-mixed method with plastic film, half xeothermic method with plastic film and a hot method with plastic film, cold method with plastic film be by sand, other add
Add agent, powdered resin and methenamine, be added in sand mixer and be uniformly mixed, blendes together grume shape alcohol is added, shake out and dry, break
Broken, screening obtains precoated sand.This production technology makes resin become liquid since solvent is added, and viscosity is low, and overlay film effect is good, but
It is that the production cycle is long, solvent-oil ratio is big, and powdered resin and curing agent easy to produce and fly upward influence environment, is suitble to small lot life
Production.Hot method overlay film is the production technology nowadays mainly used, and hot method overlay film is that silica sand is heated to 130 DEG C or more to be added to mulling
Resin, methenamine aqueous solution, calcium stearate and other additives are added in machine when silica sand cools to certain temperature.Through broken
Precoated sand is obtained after broken, screening.Silica sand temperature is higher that mass energy, silica sand temperature height is needed to make resin for the heating of this production method
Larger contraction is generated after cooling, is increased the micro-crack in resin, is influenced precoated sand quality.The precoated sand heat resistance of above-mentioned production compared with
Difference, intensity is low, mutability, is easily ruptured when being embodied in the more complicated casting of cast structure, especially cast it is thin
More easily rupturable when wall casting, material degrees of coordination is poor.
Invention content
Goal of the invention：In order to overcome the above deficiency, the object of the present invention is to provide a kind of high-strength high temperature-resistant resistance to deformation types
Precoated sand solves the problems, such as that current precoated sand intensity is low, yielding and easily defeated and dispersed, and technical process is reasonable, is controlled in conjunction with processing
Time processed and temperature can improve the quality of precoated sand.
Technical solution：A kind of high-strength high temperature-resistant resistance to deformation type precoated sand, is counted in parts by weight, which is constituted such as
Under：
100 parts of roughing sand
2-4 parts of ferroso-ferric oxide
1.5-5.6 parts of anti-burnon
1.8-3 parts of anti-vein additive
1.5-5 parts of phenolic resin
0.5-1.5 parts of 1# reinforcing agents
0.3-1.0 parts of 2# plasticizer
0.1-0.5 parts of methenamine solution
1.2-2.5 parts of lubricant.
The present invention also provides a kind of processing technologys of high-strength high temperature-resistant resistance to deformation type precoated sand, include the following steps：
1）After roughing sand is heated to 140 ~ 145 DEG C, roughing sand is put into sand mixer；
2）Ferroso-ferric oxide is added into sand mixer, stirs；
3）Step 2）Anti-burnon and anti-vein additive are added while stirring by 3-5S afterwards；
4）Step 3）Phenolic resin is added in 3-5S afterwards, stirring while, stirs 40-90S, phenolic resin is made to be completely covered on roughing sand
Surface；
5）1# reinforcing agents and 2# plasticizer is added, carries out overlay film 40-45S；
6）Methenamine solution is added, carries out solidification 30-40S；
7）Lubricant stearic acid calcium is added, carries out being blended 50-70S；
8）Cool down and be crushed, finished product puts sand；
9）Be crushed, carries out cooling packing.
Further, a kind of processing technology of high-strength high temperature-resistant resistance to deformation type precoated sand, the step 6）Middle Wu Luotuo
The preparation of product solution includes the following steps：
1）Methenamine presses 1 with water：2.5 weight ratio carries out mixed dissolution and obtains methenamine solution.
Further, a kind of processing technology of high-strength high temperature-resistant resistance to deformation type precoated sand, the step 4）Middle phenolic aldehyde tree
The preparation of fat includes the following steps：
1）Phenol, aldehyde are sequentially added in reaction kettle by formula ratio；
2）Reflux, stirring, and ammonium hydroxide is added；
3）It is heated to 70-80 DEG C to vapour, carries out exothermic heat of reaction to 80-100 DEG C of temperature, reaction time 40-50 minute；
4）Dehydration 3-5 hours is evacuated, cooling, stopping evacuates；
5）Ethanol solution is added into kettle, stirs 1 hour；
6）50 DEG C are cooled to hereinafter, blowing.
Further, a kind of processing technology of high-strength high temperature-resistant resistance to deformation type precoated sand, the preparation of the phenolic resin
Step 3）In, reactant becomes muddy milk yellow from transparent kermesinus in observing response kettle；The preparation of the phenolic resin
Step 4）In, reactant becomes red, transparent liquid from milk yellow.
Further, above-mentioned high-strength high temperature-resistant resistance to deformation type precoated sand, it is characterised in that：The anti-vein additive
Group become：
20-30 parts of di-iron trioxide
20-30 parts of ferroso-ferric oxide
30-40 parts of cenosphere
5-9 parts of strontium carbonate.
Further, a kind of processing technology of high-strength high temperature-resistant resistance to deformation type precoated sand, the anti-vein additive packet
Include following steps：
1）Di-iron trioxide, ferroso-ferric oxide are sieved with 70 mesh respectively；
2）Cenosphere is sieved with 30 mesh；
3）By above-mentioned steps 1）With 2）Gained raw material and strontium carbonate sequentially add mixing plant by technical recipe, then open
It opens stirring to be blended, is blended and finishes, discharge.
Further, above-mentioned high-strength high temperature-resistant resistance to deformation type precoated sand, the 1# reinforcing agents are calper calcium peroxide.
Further, above-mentioned high-strength high temperature-resistant resistance to deformation type precoated sand, the lubricant be zinc stearate and or it is hard
Resin acid calcium.
Above-mentioned technical proposal can be seen that the present invention and have the advantages that：High-strength high temperature-resistant of the present invention
Resistance to deformation type precoated sand, the improvement and optimization of the proportioning and preparation process of precoated sand supplementary material so that precoated sand is provided simultaneously with resistance to
The advantages of high temperature, high non-deformability, good moldability, high intensity, good fluidity and low gas forming amount, fully meet it is complicated,
The manufacturing requirements of high-performance enginer.Especially especially meet the manufacturing requirement of complex-shaped, tiny wall thickness sand core, no
Only ensure the easy collapsibility after elevated temperature strength and casting of the sand core in non-ferrous metal casting process, and the mechanical property of casting
Also it is improved.
Specific implementation mode
The embodiment of the present invention is described below in detail, in which the same or similar labels are throughly indicated same or like
Element or element with the same or similar functions.The following examples are exemplary, it is intended to for explaining the present invention, and
It is not considered as limiting the invention.
In the description of the present invention, it is to be understood that, term "center", " longitudinal direction ", " transverse direction ", " length ", " width ",
" thickness ", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom" "inner", " clockwise ", " inverse
Hour hands " etc., are merely for convenience of description of the present invention and simplification of the description, and do not indicate or imply the indicated device or element is necessary
With specific orientation, with specific azimuth configuration and operation, therefore be not considered as limiting the invention.
In addition, term " first ", " second " are used for description purposes only, it is not understood to indicate or imply relative importance
Or implicitly indicate the quantity of indicated technical characteristic.Define " first " as a result, the feature of " second " can be expressed or
Implicitly include one or more this feature.In the description of the present invention, unless otherwise indicated, the meaning of " plurality " is two
It is a or more than two, unless otherwise restricted clearly.
In the present invention unless specifically defined or limited otherwise, term " installation ", " connected ", " connection ", " fixation " etc.
Term shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection, or be integrally connected；It can be machine
Tool connects, and can also be electrical connection；It can be directly connected, can also can be indirectly connected through an intermediary two members
Connection inside part.For the ordinary skill in the art, above-mentioned term can be understood in this hair as the case may be
Concrete meaning in bright.
In the present invention unless specifically defined or limited otherwise, fisrt feature the "upper" of second feature or "lower"
It may include that the first and second features are in direct contact, can also not be to be in direct contact but pass through it including the first and second features
Between other characterisation contact.Moreover, fisrt feature second feature " on ", " top " and " above " include first special
Sign is right over second feature and oblique upper, or is merely representative of fisrt feature level height and is higher than second feature.Fisrt feature exists
Second feature " under ", " lower section " and " following " include fisrt feature immediately below second feature and obliquely downward, or be merely representative of
Fisrt feature level height is less than second feature.
Embodiment
The high-strength high temperature-resistant resistance to deformation type precoated sand of the application, is counted in parts by weight, which constitutes as follows：
100 parts of roughing sand
2-4 parts of ferroso-ferric oxide
1.5-5.6 parts of anti-burnon
1.8-3 parts of anti-vein additive
1.5-5 parts of phenolic resin
0.5-1.5 parts of 1# reinforcing agents
0.3-1.0 parts of 2# plasticizer
0.1-0.5 parts of methenamine solution
1.2-2.5 parts of lubricant.
Wherein, 1# reinforcing agents are calper calcium peroxide；Also, lubricant be zinc stearate and or calcium stearate；Further,
The parts by weight meter of 2# plasticizer matches：Glycerine 30-50, vegetable oil 20-40, sodium alkoxide 0.5-1, acid anhydrides 40-6.Further,
Eliminating smell agent can be added, eliminating smell agent constituent and its weight ratio are：Orange oil 60 ~ 70, turpentine oil 15 ~ 25, cedar oil 10 ~
20。
A kind of processing technology of high-strength high temperature-resistant resistance to deformation type precoated sand of the present invention, includes the following steps：
1）After roughing sand is heated to 140 ~ 145 DEG C, roughing sand is put into sand mixer；
2）Ferroso-ferric oxide is added into sand mixer, stirs；
3）Step 2）Anti-burnon and anti-vein additive are added while stirring by 3-5S afterwards；
4）Step 3）Phenolic resin is added in 3-5S afterwards, stirring while, stirs 40-90S, phenolic resin is made to be completely covered on roughing sand
Surface；
5）1# reinforcing agents and 2# plasticizer is added, carries out overlay film 40-45S；
6）Methenamine solution is added, carries out solidification 30-40S；
7）Lubricant stearic acid calcium is added, carries out being blended 50-70S；
8）Cool down and be crushed, finished product puts sand；
9）Be crushed, carries out cooling packing.
Above-mentioned steps 6）The preparation of middle methenamine solution includes the following steps：
1）Methenamine presses 1 with water：2.5 weight ratio carries out mixed dissolution and obtains methenamine solution.
Above-mentioned steps 4）The preparation of middle phenolic resin includes the following steps：
1）Phenol, aldehyde are sequentially added in reaction kettle by formula ratio；
2）Reflux, stirring, and ammonium hydroxide is added；
3）It is heated to 70-80 DEG C to vapour, carries out exothermic heat of reaction to 80-100 DEG C of temperature, reaction time 40-50 minute；
4）Dehydration 3-5 hours is evacuated, cooling, stopping evacuates；
5）Ethanol solution is added into kettle, stirs 1 hour；
6）50 DEG C are cooled to hereinafter, blowing.
The preparation process 3 of above-mentioned phenolic resin）In, reactant becomes muddiness from transparent kermesinus in observing response kettle
Milk yellow；The preparation process 4 of the phenolic resin）In, reactant becomes red, transparent liquid from milk yellow.
The anti-vein additive of the present invention does not influence the onsite applications performance such as the up time of resin sand, mobility, and
And the normal temperature strength of sand core is had substantially no effect on, the group of anti-vein additive becomes：
20-30 parts of di-iron trioxide
20-30 parts of ferroso-ferric oxide
30-40 parts of cenosphere
5-9 parts of strontium carbonate.
A kind of processing technology of high-strength high temperature-resistant resistance to deformation type precoated sand of the present invention, the anti-vein additive include
Following steps：
1）Di-iron trioxide, ferroso-ferric oxide are sieved with 70 mesh respectively；
2）Cenosphere is sieved with 30 mesh；
3）By above-mentioned steps 1）With 2）Gained raw material and strontium carbonate sequentially add mixing plant by technical recipe, then open
It opens stirring to be blended, is blended and finishes, discharge.
The above is only a preferred embodiment of the present invention, it is noted that for the ordinary skill people of the art
For member, without departing from the principle of the present invention, several improvement can also be made, these improvement also should be regarded as the present invention's
Protection domain.
Claims (9)
1. a kind of high-strength high temperature-resistant resistance to deformation type precoated sand, it is characterised in that：It counts in parts by weight, which is constituted such as
Under：
100 parts of roughing sand
2-4 parts of ferroso-ferric oxide
1.5-5.6 parts of anti-burnon
1.8-3 parts of anti-vein additive
1.5-5 parts of phenolic resin
0.5-1.5 parts of 1# reinforcing agents
0.3-1.0 parts of 2# plasticizer
0.1-0.5 parts of methenamine solution
1.2-2.5 parts of lubricant.
2. the processing technology of high-strength high temperature-resistant resistance to deformation type precoated sand according to claim 1, it is characterised in that：Including
Following steps：
1）After roughing sand is heated to 140 ~ 145 DEG C, roughing sand is put into sand mixer；
2）Ferroso-ferric oxide is added into sand mixer, stirs；
3）Step 2）Anti-burnon and anti-vein additive are added while stirring by 3-5S afterwards；
4）Step 3）Phenolic resin is added in 3-5S afterwards, stirring while, stirs 40-90S, phenolic resin is made to be completely covered on roughing sand
Surface；
5）1# reinforcing agents and 2# plasticizer is added, carries out overlay film 40-45S；
6）Methenamine solution is added, carries out solidification 30-40S；
7）Lubricant stearic acid calcium is added, carries out being blended 50-70S；
8）Cool down and be crushed, finished product puts sand；
9）Be crushed, carries out cooling packing.
3. the processing technology of high-strength high temperature-resistant resistance to deformation type precoated sand according to claim 2, it is characterised in that：It is described
Step 6）The preparation of middle methenamine solution includes the following steps：
1）Methenamine presses 1 with water：2.5 weight ratio carries out mixed dissolution and obtains methenamine solution.
4. the processing technology of high-strength high temperature-resistant resistance to deformation type precoated sand according to claim 2, it is characterised in that：It is described
Step 4）The preparation of middle phenolic resin includes the following steps：
1）Phenol, aldehyde are sequentially added in reaction kettle by formula ratio；
2）Reflux, stirring, and ammonium hydroxide is added；
3）It is heated to 70-80 DEG C to vapour, carries out exothermic heat of reaction to 80-100 DEG C of temperature, reaction time 40-50 minute；
4）Dehydration 3-5 hours is evacuated, cooling, stopping evacuates；
5）Ethanol solution is added into kettle, stirs 1 hour；
6）50 DEG C are cooled to hereinafter, blowing.
5. the processing technology of high-strength high temperature-resistant resistance to deformation type precoated sand according to claim 4, it is characterised in that：It is described
The preparation process 3 of phenolic resin）In, reactant becomes muddy milk yellow from transparent kermesinus in observing response kettle；It is described
The preparation process 4 of phenolic resin）In, reactant becomes red, transparent liquid from milk yellow.
6. high-strength high temperature-resistant resistance to deformation type precoated sand according to claim 1, it is characterised in that：The anti-vein addition
The group of agent becomes：
20-30 parts of di-iron trioxide
20-30 parts of ferroso-ferric oxide
30-40 parts of cenosphere
5-9 parts of strontium carbonate.
7. the processing technology of high-strength high temperature-resistant resistance to deformation type precoated sand according to claim 6, it is characterised in that：It is described
Anti- vein additive includes the following steps：
1）Di-iron trioxide, ferroso-ferric oxide are sieved with 70 mesh respectively；
2）Cenosphere is sieved with 30 mesh；
3）By above-mentioned steps 1）With 2）Gained raw material and strontium carbonate sequentially add mixing plant by technical recipe, then open
It opens stirring to be blended, is blended and finishes, discharge.
8. high-strength high temperature-resistant resistance to deformation type precoated sand according to claim 1, it is characterised in that：The 1# reinforcing agents are
Calper calcium peroxide.
9. high-strength high temperature-resistant resistance to deformation type precoated sand according to claim 1, it is characterised in that：The lubricant is hard
Resin acid zinc and or calcium stearate.
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| CN201810292729.9A CN108580794A (en) | 2018-03-30 | 2018-03-30 | A kind of high-strength high temperature-resistant resistance to deformation type precoated sand and its processing technology |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109746383A (en) * | 2019-03-22 | 2019-05-14 | 十堰长江造型材料有限公司 | A kind of steel-casting precoated sand process for making shell |
| CN110421115A (en) * | 2019-08-07 | 2019-11-08 | 柳晶（溧阳）环保科技有限公司 | A kind of preparation method of low ammonia precoated sand |
| CN112517835A (en) * | 2020-12-11 | 2021-03-19 | 南通美莱达科技有限公司 | Novel high-temperature-resistant cast steel precoated sand and preparation process thereof |
| CN112517833A (en) * | 2020-12-11 | 2021-03-19 | 南通美莱达科技有限公司 | Low-ammonia environment-friendly precoated sand and preparation process thereof |
| CN112935181A (en) * | 2021-01-29 | 2021-06-11 | 江门市磊茂五金制品有限公司 | Casting sand core resin sand and preparation thereof |
| CN113305267A (en) * | 2021-05-28 | 2021-08-27 | 康硕(德阳)智能制造有限公司 | Sand mold material for 3D printing cast steel and using method thereof |
| CN114367628A (en) * | 2021-12-29 | 2022-04-19 | 天阳新材料科技有限公司 | Anti-vein precoated sand for turbine shell and preparation method thereof |
| CN114799037A (en) * | 2022-04-20 | 2022-07-29 | 北京仁创砂业铸造材料有限公司 | Anti-vein precoated sand and preparation method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109746383A (en) * | 2019-03-22 | 2019-05-14 | 十堰长江造型材料有限公司 | A kind of steel-casting precoated sand process for making shell |
| CN110421115A (en) * | 2019-08-07 | 2019-11-08 | 柳晶（溧阳）环保科技有限公司 | A kind of preparation method of low ammonia precoated sand |
| CN112517835A (en) * | 2020-12-11 | 2021-03-19 | 南通美莱达科技有限公司 | Novel high-temperature-resistant cast steel precoated sand and preparation process thereof |
| CN112517833A (en) * | 2020-12-11 | 2021-03-19 | 南通美莱达科技有限公司 | Low-ammonia environment-friendly precoated sand and preparation process thereof |
| CN112935181A (en) * | 2021-01-29 | 2021-06-11 | 江门市磊茂五金制品有限公司 | Casting sand core resin sand and preparation thereof |
| CN113305267A (en) * | 2021-05-28 | 2021-08-27 | 康硕(德阳)智能制造有限公司 | Sand mold material for 3D printing cast steel and using method thereof |
| CN114367628A (en) * | 2021-12-29 | 2022-04-19 | 天阳新材料科技有限公司 | Anti-vein precoated sand for turbine shell and preparation method thereof |
| CN114367628B (en) * | 2021-12-29 | 2023-08-29 | 天阳新材料科技有限公司 | Vein-resistant precoated sand for turbine shell and preparation method thereof |
| CN114799037A (en) * | 2022-04-20 | 2022-07-29 | 北京仁创砂业铸造材料有限公司 | Anti-vein precoated sand and preparation method thereof |
| CN114799037B (en) * | 2022-04-20 | 2024-03-26 | 北京仁创砂业铸造材料有限公司 | Vein-resistant precoated sand and preparation method thereof |
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Application publication date: 20180928 |